Decklid Release Circuit Short To Ground
The trunk/decklid release circuit has an electrical short directly to ground, preventing the trunk from opening properly. Think of it like a light switch that's stuck in the off position because the wire is touching the metal frame.
The ECU monitors the decklid release solenoid circuit for proper voltage and current draw when the release button is activated. It expects a specific resistance and voltage drop across the solenoid; a short to ground creates zero resistance and abnormal current flow, triggering the fault.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid circuit voltage | 12V nominal with controlled current draw | 0V or excessive current indicating short to ground |
| Circuit resistance | Solenoid resistance 10-50 ohms | 0 ohms or near-zero resistance |
Code B1554 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B1554 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.